Mixed-flow type automatic curing agent adding device

Abstract

The present invention discloses a mixed-flow type automatic curing agent adding device, which comprises a storage container, a mixing pipe and an insertion pipe connecting the storage container and the mixing pipe; the storage container is used for storing the curing agent; one end of the mixing pipe is a sludge inlet, and the other end of the mixing pipe is a mixed liquid outlet; one end of the insertion pipe is communicated with the storage container, and the other end of the insertion pipe is communicated with the mixing pipe. The insertion pipe comprises at least one first insertion pipe and at least one second insertion pipe. In the cross-sectional view of the mixing pipe, the first insertion pipe is located on the clockwise side of the first diameter line of the mixing pipe passing through the insertion point, and the second insertion pipe is located on the counterclockwise side of the second diameter line of the mixing pipe passing through the insertion point. This device can achieve the full mixing of the curing agent and the sludge, increase the flow rate of the mixed liquid, improve the construction efficiency, save the construction period, avoid the problem of pipeline blockage during use, achieve the optimal ratio of the curing agent to the sludge, improve the utilization rate of the curing agent, and avoid waste caused by insufficient or excessive dosing of the curing agent.

Description

Technical Field

[0001] The present invention relates to the field of river silt solidification, and particularly to a mixed-flow type automatic curing agent adding device. Background Art

[0002] With the acceleration of economic and social development and urban construction, on the one hand, river pollution has become increasingly serious, and on the other hand, the amount of idle land has been greatly reduced. The difficulty of river dredging has shifted from the technical level to the lack of subsequent harmless treatment of silt and stacking areas. At present, many river dredging projects adopt silt solidification to solve the above problems.

[0003] As Figure 1 shown, it is a schematic diagram of an existing silt solidification device. In the process of solidifying silt by using this silt solidification device, the following problems exist:

[0004] 1. It is impossible to truly achieve the optimal ratio of the curing agent to the silt. In the existing silt solidification device, the technician adjusts the opening amount of the ball valve on the curing agent pipeline to control the addition amount of the curing agent. This adjustment process is completely carried out relying on some operation experience of the technician. During the construction process, manual dredging is carried out at the front end. Due to the influence of human factors, the flow rate of the silt is extremely unstable, and the addition amount of the curing agent depends entirely on the experience of the technician. It is bound to be impossible to truly achieve the real-time optimal ratio. When the flow rate of the silt is small, it may lead to excessive addition of the curing agent, resulting in waste; when the flow rate of the silt is large, it may lead to insufficient dosage of the curing agent, and the solidification effect is not good. Even when the front-end workers stop dredging, due to poor communication, the technician is still adding the curing agent, resulting in continuous empty injection of the curing agent, causing waste.

[0005] 2. It is easy to cause pipeline blockage. Referring to Figure 2 shown, it is a partial schematic diagram of the mixing area in the existing silt solidification device. At present, usually, a T-shaped three-way is first used to add the curing agent to the silt, and then at the turning point of the "S"-shaped mixing pipeline, the mixed fluid formed by the silt and the curing agent impacts the pipe wall, so that the two can be better fused. However, due to a large amount of withered branches, fallen leaves and solid garbage in the silt, in the actual construction process, pipeline blockage often occurs at the turning point from point "B" to point "H". Each time there is a blockage, the "S"-shaped mixing pipe has to be disassembled for pipeline cleaning, seriously affecting the project duration.

[0006] 3. Reduce the flow rate of the solidified silt mixed fluid. At point "A", due to the counterflow of the curing agent flow direction and the silt flow direction, the flow rate of the mixed fluid of the two is bound to be less than the original silt flow rate. Coupled with the certain viscosity of both the curing agent and the silt, on the one hand, the dredging efficiency is reduced, and on the other hand, the pipeline blockage problem is aggravated due to the reduced flow rate. Summary of the Invention

[0007] To overcome the defects in the prior art, an embodiment of the present invention provides a mixed-flow type automatic curing agent adding device. The mixed-flow type automatic curing agent adding device has a simple structure, can improve the flow rate of the mixed liquid while achieving sufficient mixing of the curing agent and the sludge, thereby improving the construction efficiency and saving the construction period; the mixed-flow type automatic curing agent adding device can also avoid the problem of pipeline blockage during use; the mixed-flow type automatic curing agent adding device can also achieve the optimal ratio of the curing agent to the sludge, improve the utilization rate of the curing agent, and avoid waste caused by insufficient or excessive dosing of the curing agent.

[0008] To achieve the above object, the technical solution adopted by the present invention is:

[0009] A mixed-flow type automatic curing agent adding device, comprising:

[0010] A storage container for storing the curing agent;

[0011] A mixing pipe, one end of the mixing pipe is a sludge inlet, and the other end of the mixing pipe is an outlet for the mixed liquid formed by the curing agent and the sludge;

[0012] An insertion pipe, one end of the insertion pipe is connected to the storage container, and the other end of the insertion pipe is connected to the mixing pipe. The insertion pipe includes at least one first insertion pipe and at least one second insertion pipe. In the cross-sectional view of the mixing pipe, the first insertion pipe is located on the clockwise side of the first diameter line of the mixing pipe through the insertion point, and the second insertion pipe is located on the counterclockwise side of the second diameter line of the mixing pipe through the insertion point.

[0013] The cross-sectional view refers to a view obtained by hypothetically cutting the mixing pipe at the insertion point with a cutting plane parallel to the cross-section of the mixing pipe, removing the part between the observer and the cutting plane, and projecting the remaining part onto the projection plane. The insertion point refers to the intersection and connection point of the insertion pipe and the mixing pipe. The first diameter line refers to the line connecting the center of the mixing pipe and the insertion point of the first insertion pipe in the cross-sectional view of the mixing pipe. The second diameter line refers to the line connecting the center of the mixing pipe and the insertion point of the second insertion pipe in the cross-sectional view of the mixing pipe.

[0014] In this application, by providing an insertion pipe between the storage container and the mixing pipe, including a first insertion pipe and a second insertion pipe, and the first insertion pipe and the second insertion pipe are arranged in opposite inclination directions relative to the diameter line passing through the insertion point, under the impact of the curing agent, the mixed liquid formed by the curing agent and the sludge will rotate in two opposite directions respectively when passing through the first insertion pipe and the second insertion pipe. Therefore, by adding the curing agent to the mixing pipe with different rotation directions to mix with the sludge, it is ensured that the curing agent and the sludge can be fully mixed, and the utilization rate of the curing agent is improved.

[0015] Furthermore, the first insertion tube and the second insertion tube are arranged at intervals along the length direction of the mixing tube. For example, when passing through the first insertion tube, the mixed liquid rotates in the clockwise direction, and when passing through the second insertion tube, the mixed liquid rotates in the counterclockwise direction. The mixed liquid formed by the curing agent and the sludge flows along the mixing tube. When the mixed liquid flows to the rear of all the insertion tubes, the curing agent and the sludge in the mixed liquid are better fused. The first insertion tube and the second insertion tube are arranged at intervals to fuse the curing agent and the sludge in batches, improving the mixing effect of the curing agent and the sludge.

[0016] Furthermore, the distance between the adjacent first insertion tube and the second insertion tube in the length direction of the mixing tube is 300 mm to 600 mm. Further preferably, the distance between the adjacent first insertion tube and the second insertion tube in the length direction of the mixing tube is 400 mm. If the distance between the first insertion tube and the second insertion tube is set too large, the overall volume of the device will become larger, which is not conducive to the movement of the device. If the distance between the first insertion tube and the second insertion tube is set too small, it cannot ensure good fusion of the curing agent and the sludge. Through experimental tests, it is obtained that setting the distance between the first insertion tube and the second insertion tube in the length direction of the mixing tube at about 400 mm is a more appropriate range.

[0017] Furthermore, the angle between the first insertion tube and its corresponding first radial line is equal to the angle between the second insertion tube and its corresponding second radial line. Setting the same angle between the first insertion tube, the second insertion tube and the radial line can facilitate processing. In actual processing, the angles between the first insertion tube, the second insertion tube and the radial line can also be changed according to the types of the curing agent and the sludge, and different angles can be set between the first insertion tube, the second insertion tube and the radial line respectively. In actual processing, the first insertion tube can be rotated 20° to 30° clockwise relative to its corresponding first radial line. The second insertion tube can be rotated 20° to 30° counterclockwise relative to its corresponding second radial line. Preferably, the first insertion tube can be rotated 25° clockwise relative to its corresponding first radial line. The second insertion tube can be rotated 25° counterclockwise relative to its corresponding second radial line.

[0018] Furthermore, the insertion tube is inclined relative to the mixing tube, and the end of the insertion tube facing away from the mixing tube to the end connected to the mixing tube is arranged along the sludge flow direction. By inclining the insertion tube relative to the mixing tube, when the curing agent is mixed with the sludge, the curing agent has both a flow velocity in the direction perpendicular to the sludge flow direction and a flow velocity in the same direction as the sludge flow direction. When the curing agent is added to the sludge, the flow velocity in the same direction as the sludge flow direction can push the sludge forward, assisting the flow of the sludge, increasing the flow velocity of the mixed liquid formed by the sludge and the curing agent in the mixing tube, improving the construction efficiency and shortening the construction period. The flow velocity in the direction perpendicular to the sludge can enable the curing agent to enter the sludge, improving the fusion effect of the curing agent and the sludge.

[0019] Furthermore, the included angle between the axis of the intubation tube and the axis of the mixing tube is 20° to 40°. More preferably, the included angle between the axis of the intubation tube and the axis of the mixing tube is 30°. When the included angle between the axis of the intubation tube and the axis of the mixing tube is too small, the flow velocity of the curing agent in the same direction as the sludge is relatively large, and the flow velocity in the direction perpendicular to the sludge is relatively small. The curing agent cannot be well incorporated into the sludge, affecting the mixing effect of the two. When the included angle between the axis of the intubation tube and the axis of the mixing tube is too large, the flow velocity of the curing agent in the direction perpendicular to the sludge is relatively large, and the flow velocity in the same direction as the sludge is relatively small, which will reduce the flow velocity of the slurry. Through actual operation, it is found that setting the included angle between the axis of the intubation tube and the axis of the mixing tube to 20° to 40° is a more appropriate range. Especially when the included angle between the axis of the intubation tube and the axis of the mixing tube is set to 30°, a better balance is achieved between the flow velocity of the mixed liquid and the fusion effect of the mixed liquid.

[0020] Furthermore, the mixed-flow type automatic curing agent adding device includes at least one group of first intubation tube groups and at least one group of second intubation tube groups. Each first intubation tube group includes at least two first intubation tubes, and each second intubation tube group includes at least two second intubation tubes. The first intubation tube groups and the second intubation tube groups are arranged at intervals along the length direction of the mixing tube. By increasing the number of intubation tubes, the mixing effect of the curing agent and the sludge is further improved. It can be understood that the more the number of the first intubation tube groups and the second intubation tube groups, the better the mixing effect of the curing agent and the sludge. However, with the increase in the number of the first intubation tube groups and the second intubation tube groups, the overall weight of the mixed-flow type automatic curing agent adding device is also continuously increasing, which is inconvenient for the handling of the mixed-flow type automatic curing agent adding device during use. The increase in the number of the first intubation tube groups and the second intubation tube groups also increases the manufacturing cost of the curing device. Through actual use and summary, making the mixed-flow type automatic curing agent adding device include one group of first intubation tubes and one group of second intubation tubes can meet the mixing effect of the curing agent and the sludge while reducing the overall weight of the mixed-flow type automatic curing agent adding device and reducing the manufacturing cost.

[0021] Furthermore, the insertion points of at least two intubation tubes in the intubation tube group are located on the same cross-section of the mixing tube. Preferably, the insertion points of all the intubation tubes in the intubation tube group are located on the same cross-section of the mixing tube. Setting the insertion points of multiple intubation tubes on the same cross-section enables the curing agent to be injected into the sludge to the greatest extent and evenly.

[0022] More preferably, multiple intubation tubes in the intubation tube group are evenly distributed around the outer periphery of the mixing tube. Uniformly distributing multiple intubation tubes in the intubation tube group can further improve the mixing uniformity and facilitate the arrangement and processing of the intubation tubes on the mixing tube.

[0023] Further, the mixed-flow type automatic curing agent adding device includes a set of first inserting pipes and a set of second inserting pipes. The first inserting pipe set includes three first inserting pipes. The insertion points of the three first inserting pipes are located on the same cross-section of the mixing pipe, and the three first inserting pipes are evenly distributed around the outer periphery of the mixing pipe. The second inserting pipe set includes three second inserting pipes. The insertion points of the three second inserting pipes are located on the same cross-section of the mixing pipe, and the three second inserting pipes are evenly distributed around the outer periphery of the mixing pipe. When the number of inserting pipes in the inserting pipe set is small, it will affect the mixing effect of the curing agent and the sludge. When the number of inserting pipes in the inserting pipe set is large, in order to stabilize the flow rate of the curing agent, the diameter of the inserting pipe will be correspondingly reduced. The reduction of the inserting pipe diameter will increase the manufacturing difficulty and cost of the inserting pipe. Through experiments, it is found that setting three inserting pipes in a set is a more appropriate choice. This setting method comprehensively considers the mixing effect of the curing agent and the sludge, the difficulty of pipe diameter processing, and the flow rate of the curing agent in the inserting pipe.

[0024] Further, the mixed-flow type automatic curing agent adding device further includes a connecting pipe connected between the storage container and the inserting pipe, a first flow meter and a variable frequency pump arranged on the connecting pipe, a second flow meter arranged on the mixing pipe and at the front end of the insertion point of the inserting pipe, and an electric control box connected to the first flow meter, the variable frequency pump, and the second flow meter. The first flow meter can adopt an electronic flow meter. The first flow meter is used to monitor in real time the amount of the curing agent input from the storage container into the mixing pipe. The second flow meter can adopt an ultrasonic flow meter. Specifically, an external-mounted ultrasonic flow meter can be adopted, which can avoid the space occupied by the flow meter in the mixing pipe and the influence on the sludge flow rate in the mixing pipe. The electric control box adjusts the output power of the variable frequency pump according to the curing agent flow rate and the sludge flow rate input in real time by the first flow meter and the second flow meter, so as to adjust the amount of the curing agent added into the mixing pipe and achieve the optimal ratio of the curing agent and the sludge. Before use, an experiment on the ratio setting of the curing agent and the sludge can be carried out to obtain the optimal ratio data of the curing agent and the sludge, and the optimal ratio data is preset into the electric control box. During actual use, the addition amount of the curing agent is adjusted according to the preset optimal ratio data. Through the settings of the first flow meter, the second flow meter, the variable frequency pump, and the electric control box, the automatic mixing of the curing agent and the sludge according to the optimal ratio can be realized, the influence of human factors can be reduced, and the situation of curing agent waste or insufficient curing agent input can be avoided.

[0025] Under normal circumstances, the mixing pipe can adopt a straight pipe structure. Adopting a straight pipe structure can prevent silt from clogging in the mixing pipe, thereby reducing the cleaning of the pipeline during use and ensuring the project duration. Specifically, the mixing pipe can adopt a DN200 pipe (the diameter of the mixing pipe is 200 mm), the inserting pipe can adopt a DN20 pipe (the diameter of the inserting pipe is 20 mm), and the connecting pipe can adopt a DN50 pipe (the diameter of the connecting pipe is 50 mm). To facilitate the connection of the device, one end of the connecting pipe is directly connected to the storage container, and a DN50 external thread interface is provided at the other end of the connecting pipe. One end of the inserting pipe is directly connected to the mixing pipe, and the other end of the inserting pipe communicates with the branch pipe. Multiple branch pipes converge to the connecting pipe, and the connecting pipe and the external thread interface form a detachable connection method. During actual use, usually the number of inserting pipes in each inserting pipe group is set according to the sum of the cross-sections of multiple inserting pipes in the group being approximately equal to the cross-section of the connecting pipe. The diameter ratio of the mixing pipe to the inserting pipe is about 9 to 11.

[0026] In this application, the structures and connection methods of the mixing pipe and the inserting pipe are very simple. Through the combination of the two, on the premise of ensuring the mixing effect of the curing agent and the silt, the flow rate of the mixed liquid can be increased, and the mixed liquid can be prevented from clogging in the mixing pipe. Compared with the existing methods of setting stirring devices in the mixing pipe or setting mixing pipes with complex shapes, the mixed-flow automatic curing agent adding device in this application has better effects and can greatly reduce the production and manufacturing costs.

[0027] Furthermore, the mixed-flow automatic curing agent adding device further includes a cover body, which is mainly used to protect the device. Specifically, the main part of the mixing pipe, the second flowmeter, and the inserting pipe can be arranged inside the cover body to prevent the inserting pipe from being damaged and affecting the normal use of the device. The connecting pipe, the variable frequency pump, the first flowmeter, and the external thread interface provided on the connecting pipe can be arranged outside the cover body to facilitate the connection of the device.

[0028] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0029] 1. By arranging inserting pipes, including the first inserting pipe and the second inserting pipe, between the storage container and the mixing pipe, and setting the first inserting pipe and the second inserting pipe in opposite inclined directions with respect to the radial line passing through the insertion point, under the impact of the curing agent, the mixed liquid formed by the curing agent and the silt will rotate in two opposite directions respectively when passing through the first inserting pipe and the second inserting pipe. For example, when passing through the first inserting pipe, the mixed liquid rotates in the clockwise direction, and when passing through the second inserting pipe, the mixed liquid rotates in the counterclockwise direction. Along the flow direction, when the mixed liquid flows to the rear of all the inserting pipes, the curing agent and the silt in the mixed liquid are better fused. Therefore, by adding the curing agent to the mixing pipe with different rotation directions to mix with the silt, it is ensured that the curing agent and the silt can be fully mixed, and the utilization rate of the curing agent is improved.

[0030] 2. By setting the intubation tube and the mixing tube at an inclination, when the curing agent is mixed with the sludge, the curing agent has both a flow velocity in the direction perpendicular to the flow direction of the sludge and a flow velocity in the same direction as the flow direction of the sludge. When the curing agent is added to the sludge, the flow velocity in the same direction as the flow direction of the sludge can push the sludge forward, assist the flow of the sludge, increase the flow velocity of the mixed liquid formed by the sludge and the curing agent in the mixing tube, improve the construction efficiency, and shorten the construction period. The flow velocity in the direction perpendicular to the sludge can enable the curing agent to enter the sludge and improve the mixing effect of the curing agent and the sludge.

[0031] 3. By setting up an intubation tube group, multiple intubation tubes are arranged in each intubation tube group, and the multiple intubation tubes are located on the same cross-section of the mixing tube and are evenly distributed around the outer periphery of the mixing tube, which can make the mixing of the curing agent and the sludge more uniform and facilitate the processing of the device.

[0032] 4. Through the setting of the first flowmeter, the second flowmeter, the variable-frequency pump and the electric control box, the mixing of the curing agent and the sludge according to the optimal ratio can be automatically realized, the influence of human factors can be reduced, and the situation of waste of the curing agent or insufficient input of the curing agent can be avoided.

[0033] 5. Both the mixing tube and the intubation tube adopt a straight tube structure, which has a simple shape and a simple connection method, simplifies the structure of the whole device, can increase the flow velocity of the mixed liquid while improving the mixing effect of the curing agent and the sludge, prevent the mixing tube from being blocked, and achieve the optimal ratio of the curing agent and the sludge. Multiple beneficial effects are realized simultaneously with a simple structure.

[0034] To make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, is described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0036] Figure 1 It is a schematic diagram of an existing mixed-flow type automatic curing agent adding device in the background art of the present invention;

[0037] Figure 2 It is a partial schematic diagram of the mixing area in an existing mixed-flow type automatic curing agent adding device in the background art of the present invention;

[0038] Figure 3 It is a schematic diagram of a mixed-flow type automatic curing agent adding device in an embodiment of the present invention;

[0039] Figure 4 It is a schematic diagram of the connection between the mixing tube and the cannula in an embodiment of the present invention;

[0040] Figure 5 It is a left view of the mixing tube and the cannula in an embodiment of the present invention;

[0041] Figure 6 It is a cross-sectional view of the first cannula group and the mixing tube in an embodiment of the present invention;

[0042] Figure 7 It is a cross-sectional view of the second cannula group and the mixing tube in an embodiment of the present invention;

[0043] Figure 8 It is a front view of the mixing tube and the cannula in an embodiment of the present invention;

[0044] Figure 9 It is a three-dimensional model of the combination of the mixing tube and the cannula in an embodiment of the present invention;

[0045] Figure 10 It is a residual curve graph obtained by simulation in an embodiment of the present invention;

[0046] Figure 11 It is a phase distribution graph obtained by simulation in an embodiment of the present invention;

[0047] Figure 12 It is a first phase distribution graph of the mixing tube at the insertion point of the first cannula obtained by simulation in an embodiment of the present invention;

[0048] Figure 13 It is a first phase distribution graph of the mixing tube at the insertion point of the second cannula obtained by simulation in an embodiment of the present invention;

[0049] Figure 14 It is a first phase distribution graph at 600 mm downstream of the insertion point of the second cannula obtained by simulation in an embodiment of the present invention.

[0050] Reference numerals of the above drawings: 1. Storage container; 2. Mixing tube; 31. First cannula; 32. Second cannula; 4. First flowmeter; 5. Second flowmeter; 6. Variable frequency pump; 7. Electric control box; 8. Insertion point; 9. First diameter line; 10. Second diameter line; 11. Connecting pipe; 12. Connecting tube; 13. Branch pipe; 14. External thread port. Detailed implementation manners

[0051] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] Embodiment 1: Refer to Figures 3 to 14 As shown, a mixed-flow type automatic curing agent adding device includes a storage container 1, a mixing pipe 2, and an insertion pipe connecting the storage container 1 and the mixing pipe 2. The insertion pipe includes a first insertion pipe 31 and a second insertion pipe 32. In the cross-sectional view of the mixing pipe 2, the first insertion pipe 31 is located on the clockwise side of the first diameter line 9 of the mixing pipe 2 passing through the insertion point 8, and the second insertion pipe 32 is located on the counterclockwise side of the second diameter line of the mixing pipe 2 passing through the insertion point 8.

[0053] The storage container 1 is used to store the curing agent, and it is a storage tank. An adding port and an output port are provided on the storage tank. The output port is connected with a connecting pipe 11 with a DN50, and the end of the connecting pipe 11 facing away from the storage tank is provided with an external thread interface with a DN50.

[0054] The mixing pipe 2 has a straight pipe structure and uses a DN200 pipe. Using a straight pipe structure can avoid blockage of silt in the mixing pipe 2, thereby reducing the cleaning of the pipeline during use and ensuring the project construction period. One end of the mixing pipe 2 is a silt inlet end, and the other end of the mixing pipe 2 is a mixed liquid outlet end formed by the curing agent and silt. The silt inlet end is connected with a dredging hose for inputting silt into the mixing pipe 2. The mixed liquid outlet end is connected with the pipeline of the next curing process.

[0055] One end of the insertion pipe is directly communicated with the mixing pipe 2, and the other end of the insertion pipe is sequentially communicated with the storage container 1 through a branch pipe 13, a connecting pipe 12, and a connecting pipe 11. Specifically, one end of the connecting pipe 12 is detachably connected with the external thread interface at the end of the connecting pipe 11. The other end of the connecting pipe 12 is provided with a branch pipe 13 communicated with the insertion pipe. The insertion pipe has a straight pipe structure and uses a DN20 pipe.

[0056] The first insertion pipe 31 and the second insertion pipe 32 are arranged at intervals along the length direction of the mixing pipe 2. Specifically, the distance between the adjacent first insertion pipe 31 and the second insertion pipe 32 in the length direction of the mixing pipe 2 is 400 mm.

[0057] By arranging an insertion tube between the storage container 1 and the mixing tube 2, and setting the first insertion tube 31 and the second insertion tube 32 in opposite inclined directions with respect to the radial line of the insertion point 8, under the impact of the curing agent, when the mixed liquid passes through the first insertion tube 31 and the second insertion tube 32, it will rotate in two opposite directions respectively. When the mixed liquid flows to the rear of the second insertion tube 32, the curing agent and the sludge in the mixed liquid are better fused. Therefore, by adding the curing agent with different rotation directions into the mixing tube 2 to mix with the sludge, it is ensured that the curing agent and the sludge can be fully mixed, and the utilization rate of the curing agent is improved.

[0058] See Figure 4 As shown, in a possible implementation manner, the mixed-flow type automatic curing agent adding device includes a group of first insertion tubes 31 and a group of second insertion tubes 32. The group of first insertion tubes 31 and the group of second insertion tubes 32 are arranged at intervals along the length direction of the mixing tube 2. It can be understood that the more the number of the group of first insertion tubes 31 and the group of second insertion tubes 32, the better the mixing effect of the curing agent and the sludge. However, with the increase in the number of the group of first insertion tubes 31 and the group of second insertion tubes 32, the overall weight of the mixed-flow type automatic curing agent adding device is also continuously increasing, and it is inconvenient to carry the mixed-flow type automatic curing agent adding device during use. The increase in the number of the group of first insertion tubes 31 and the group of second insertion tubes 32 also increases the manufacturing cost of the curing device. Through actual use and summary, making the mixed-flow type automatic curing agent adding device include a group of first insertion tubes 31 and a group of second insertion tubes 32 can, while reducing the overall weight of the mixed-flow type automatic curing agent adding device and reducing the manufacturing cost, also meet the mixing effect of the curing agent and the sludge.

[0059] See Figure 5As shown, the first cannula group 31 includes three first cannulas 31, and the second cannula group 32 includes three second cannulas 32. The insertion points 8 of the three first cannulas 31 are located on the same cross-section of the mixing pipe 2, and the three first cannulas 31 are evenly distributed around the outer periphery of the mixing pipe 2. Similarly, the insertion points 8 of the three second cannulas 32 are located on the same cross-section of the mixing pipe 2, and the three second cannulas 32 are evenly distributed around the outer periphery of the mixing pipe 2. The insertion point 8 refers to the intersection and connection point between the cannula and the mixing pipe 2. The first cannula 31 is located on the left side of the first diameter line 9 of the mixing pipe 2 passing through the insertion point 8, and the second cannula 32 is located on the right side of the second diameter line of the mixing pipe 2 passing through the insertion point 8. The first diameter line 9 refers to the connecting line between the center of the mixing pipe 2 and the insertion point 8 of the first cannula 31 in the cross-sectional view of the mixing pipe 2. The second diameter line refers to the connecting line between the center of the mixing pipe 2 and the insertion point 8 of the second cannula 32 in the cross-sectional view of the mixing pipe 2. The cross-sectional view refers to the figure obtained by hypothetically cutting the mixing pipe 2 at the insertion point 8 with a cutting plane parallel to the cross-section of the mixing pipe 2, removing the part between the observer and the cutting plane, and projecting the remaining part onto the projection plane.

[0060] Specifically, refer to Figure 6 As shown, three first cannulas 31 are arranged around the mixing pipe 2 to form the first cannula group 31. In the cross-sectional view, the angle between two adjacent first cannulas 31 is 120°. The angle between the first cannula 31 and the first diameter line 9 passing through its insertion point 8 is 25°. The three first cannulas 31 in the same group, relative to their respective first diameter lines 9, are all inclined towards the left from the insertion point 8. The insertion points 8 of the three first cannulas 31 in the same group are set on the same cross-section of the mixing pipe 2, and the three first cannulas 31 are evenly distributed around the outer periphery of the mixing pipe 2, so that the curing agent can be injected into the sludge to the greatest extent and evenly, and it is convenient for the arrangement and processing of the cannulas on the mixing pipe 2.

[0061] Refer to Figure 7 As shown, three second cannulas 32 are arranged around the mixing pipe 2 to form the second cannula group 32. In the cross-sectional view, the angle between two adjacent second cannulas 32 is 120°. The angle between the second cannula 32 and the second diameter line passing through its insertion point 8 is 25°. The three second cannulas 32 in the same group, relative to their respective second diameter lines, are all inclined towards the right from the insertion point 8.

[0062] Refer to Figure 8As shown, in a possible implementation, the intubation tube is inclined relative to the mixing tube 2. One end of the intubation tube facing away from the mixing tube 2 is arranged along the sludge flow direction to the end connected to the mixing tube 2. By arranging the intubation tube inclined to the mixing tube 2, when the curing agent is mixed with the sludge, the curing agent has both a flow velocity in the direction perpendicular to the sludge flow direction and a flow velocity in the same direction as the sludge flow direction. When the curing agent is added to the sludge, the flow velocity in the same direction as the sludge flow direction can push the sludge forward, assist the flow of the sludge, increase the flow velocity of the mixed liquid formed by the sludge and the curing agent in the mixing tube 2, improve the construction efficiency, and shorten the construction period. The flow velocity in the direction perpendicular to the sludge can enable the curing agent to enter the sludge and improve the fusion effect of the curing agent and the sludge.

[0063] In a possible implementation, the included angle between the axis of the intubation tube and the mixing tube 2 is 30°. When the angle between the axis of the intubation tube and the mixing tube 2 is too small, the flow velocity of the curing agent in the same direction as the sludge is large, and the flow velocity in the direction perpendicular to the sludge is small. The curing agent cannot be well incorporated into the sludge, affecting the mixing effect of the two. When the angle between the axis of the intubation tube and the mixing tube 2 is too large, the flow velocity of the curing agent in the direction perpendicular to the sludge is large, and the flow velocity in the same direction as the sludge is small, which will reduce the flow velocity of the slurry. Through actual operation, it is found that setting the included angle between the axis of the intubation tube and the mixing tube to be 20° - 40° is a more appropriate range. Especially when the included angle between the axis of the intubation tube and the mixing tube 2 is set to 30°, a better balance is achieved between the flow velocity of the mixed liquid and the fusion effect of the mixed liquid.

[0064] In a possible implementation, the mixed-flow type automatic curing agent adding device further includes a first flowmeter 4 and a variable-frequency pump 6 disposed on the connecting pipe 11, a second flowmeter 5 disposed on the mixing pipe 2 and at the front end of the insertion point 8 of the insertion tube, and an electric control box 7 connected to the first flowmeter 4, the variable-frequency pump 6, and the second flowmeter 5. The first flowmeter 4 uses an electronic flowmeter. The first flowmeter 4 is used to monitor in real time the amount of the curing agent input from the storage container 1 into the mixing pipe 2. The second flowmeter 5 uses an ultrasonic flowmeter. Specifically, an external-mounted ultrasonic flowmeter is adopted, which can avoid the flowmeter occupying space in the mixing pipe 2 and affecting the sludge flow rate in the mixing pipe 2. The electric control box 7 adjusts the output power of the variable-frequency pump 6 according to the curing agent flow rate and the sludge flow rate input in real time by the first flowmeter 4 and the second flowmeter 5, so as to adjust the amount of the curing agent added into the mixing pipe 2 and achieve the optimal ratio of the curing agent to the sludge. Before use, experiments can be set for the ratio of the curing agent to the sludge to obtain the optimal ratio data of the curing agent to the sludge, and the optimal ratio data is preset into the electric control box 7. During actual use, the addition amount of the curing agent is adjusted according to the preset optimal ratio data. Through the settings of the first flowmeter 4, the second flowmeter 5, the variable-frequency pump 6 and the electric control box 7, the automatic mixing of the curing agent and the sludge according to the optimal ratio can be realized, the influence of human factors can be reduced, and the situations of curing agent waste or insufficient curing agent input can be avoided.

[0065] In a possible implementation, the mixed-flow type automatic curing agent adding device further includes a cover body, which is mainly used to protect the device. Specifically, the main part of the mixing pipe 2, the second flowmeter 5 and the insertion tube are arranged inside the cover body to prevent the insertion tube from being damaged and affecting the normal use of the device. The connecting pipe 11, the variable-frequency pump 6, the first flowmeter 4 and the external thread interface arranged on the connecting pipe 11 are arranged outside the cover body to facilitate the connection of the device.

[0066] In order to further illustrate the advantages of the mixed-flow type automatic curing agent adding device in the process of mixing the curing agent and the sludge in this embodiment, the following tests are carried out on the mixed-flow type automatic curing agent adding device in this application:

[0067] Use SPACECLAIM 2024 R1 to establish a 3D model of the combination of the mixing tube 2 and the insertion tube. In this 3D model, the diameter of the mixing tube 2 is 200 mm. Along the length direction of the mixing tube 2, a first insertion tube group 31 and a second insertion tube group 32 are arranged in sequence. The first insertion tube group 31 includes three first insertion tubes 31, and the insertion points 8 of the three first insertion tubes 31 are located on the same cross-section of the mixing tube 2. The three first insertion tubes 31 are evenly distributed around the outer periphery of the mixing tube 2. The angle between the first insertion tube 31 and its corresponding first radial line 9 is 25°, and the three first insertion tubes 31 are rotated 25° clockwise relative to their corresponding first radial lines 9. Similarly, the second insertion tube group 32 includes three second insertion tubes 32, and the insertion points 8 of the three second insertion tubes 32 are located on the same cross-section of the mixing tube 2. The three second insertion tubes 32 are evenly distributed around the outer periphery of the mixing tube 2. The angle between the second insertion tube 32 and its corresponding second radial line is 25°, and the three second insertion tubes 32 are rotated 25° counterclockwise relative to their corresponding second radial lines. The distance between the first insertion tube 31 and the second insertion tube 32 in the length direction of the mixing tube 2 is 400 mm. Then, divide the mesh of the 3D model, set the maximum mesh scale to 0.1 m, and turn on the adjacent mesh control and curvature control. Add 10 layers of expansion layers to the wall surface of the mixing tube 2, with a growth factor of 1.2, the number of mesh elements is 571638, the number of nodes is 242366, and the average mesh quality is 0.76886. See Figure 9 as shown. In the simulation, use the pressure-based steady-state calculation and the SST k-omega two-equation turbulence model. Create the parameters of the sludge and the curing agent: set the density of the curing agent to 1.0 ton / m³ and the viscosity to 0.9 mPa·s. The density of the sludge is 1.8 ton / m³ and the viscosity is 0.40 mPa·s.

[0068] The following is the test result diagram obtained after the above settings:

[0069] See Figure 10 as shown, which is the residual curve diagram obtained by simulation. From this residual curve diagram, it can be obtained that the residual curves of the mathematical simulation calculations are all smoothed and are all reduced to the set residual standard 10 -3 The following shows that the calculation results are convergent, indicating that the results of the mathematical simulation calculations are relatively accurate.

[0070] See Figure 11 as shown, which is the phase distribution diagram obtained by simulation. From this phase distribution diagram, it can be obtained that by observing the mixing effect of the curing agent and the sludge after the curing agent enters from the longitudinal section of the entire mixing tube 2, it can be seen that after the first insertion tube group 31, there is only a certain mixing effect at the local four peripheral edges. After the second insertion tube group 32, the mixing effect gradually strengthens. Especially after a certain distance, it is basically completely mixed.

[0071] SeeFigure 12 As shown, it is the phase distribution diagram of the mixing pipe 2 at the insertion point 8 of the first intubation tube 31 obtained through simulation. It can be obtained from this phase distribution diagram that only a small amount of mixing occurs at the insertion point 8 of the first intubation tube 31.

[0072] See Figure 13 As shown, it is the phase distribution diagram of the mixing pipe 2 at the insertion point 8 of the second intubation tube 32 obtained through simulation. It can be obtained from this phase distribution diagram that due to a certain rotational mixing effect around the pipe wall, new curing agent is added at the insertion point 8 of the second intubation tube 32, and the mixing effect is further enhanced.

[0073] See Figure 14 As shown, it is the phase distribution diagram 600 mm downstream of the insertion point 8 of the second intubation tube 32 obtained through simulation. It can be obtained from this phase distribution diagram that the curing agent with two rotational directions is mixed well with the silt in the mixing pipe 2 as it flows through the mixing pipe 2.

[0074] In the present invention, specific embodiments are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A mixed-flow type automatic curing agent adding device, characterized in that, Comprising: A storage container for storing a curing agent; A mixing tube, one end of the mixing tube being a sludge inlet and the other end being an outlet for the mixed liquid formed by the curing agent and the sludge; An insertion tube, one end of the insertion tube being communicated with the storage container and the other end being communicated with the mixing tube. The insertion tube includes at least one first insertion tube and at least one second insertion tube. In the cross-sectional view of the mixing tube, the first insertion tube is located on the clockwise side of the first diameter line of the mixing tube through the insertion point, and the second insertion tube is located on the counterclockwise side of the second diameter line of the mixing tube through the insertion point; The first insertion tube and the second insertion tube are arranged at intervals along the length direction of the mixing tube, and the distance between the adjacent first insertion tube and the second insertion tube in the length direction of the mixing tube is 300 mm to 600 mm; The insertion tube is inclined relative to the mixing tube, and the end of the insertion tube facing away from the mixing tube is arranged along the sludge flow direction to the end connected to the mixing tube; the included angle between the axis of the insertion tube and the mixing tube is 20° to 40°; The mixed-flow automatic curing agent adding device includes at least one group of first insertion tube groups and at least one group of second insertion tube groups. The first insertion tube group includes at least two first insertion tubes, and the second insertion tube group includes at least two second insertion tubes. The first insertion tube group and the second insertion tube group are arranged at intervals along the length direction of the mixing tube; The insertion points of at least two insertion tubes in the insertion tube group are located on the same cross-section of the mixing tube.

2. The mixed-flow type automatic curing agent adding device according to claim 1, characterized in that, The included angle between the first insertion tube and its corresponding first diameter line is equal to the included angle between the second insertion tube and its corresponding second diameter line.

3. The mixed-flow type automatic curing agent adding device according to claim 1, wherein Multiple insertion tubes in the insertion tube group are evenly distributed around the outer periphery of the mixing tube.

4. The mixed-flow type automatic curing agent adding device according to claim 1, wherein The mixed-flow automatic curing agent adding device includes one group of first insertion tube groups and one group of second insertion tube groups. The first insertion tube group includes three first insertion tubes, and the insertion points of the three first insertion tubes are located on the same cross-section of the mixing tube, and the three first insertion tubes are evenly distributed around the outer periphery of the mixing tube; the second insertion tube group includes three second insertion tubes, and the insertion points of the three second insertion tubes are located on the same cross-section of the mixing tube, and the three second insertion tubes are evenly distributed around the outer periphery of the mixing tube.

5. The mixed-flow type automatic curing agent adding device according to claim 1, characterized in that, The mixed-flow automatic curing agent adding device further includes a communication tube connected between the storage container and the insertion tube, a first flow meter and a variable frequency pump arranged on the communication tube, a second flow meter arranged on the mixing tube and located at the front end of the insertion points of all the insertion tubes, and an electric control box connected to the first flow meter, the variable frequency pump and the second flow meter.

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